Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263138AbUC2UNv (ORCPT ); Mon, 29 Mar 2004 15:13:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263136AbUC2UNv (ORCPT ); Mon, 29 Mar 2004 15:13:51 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:49037 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S263131AbUC2UNt (ORCPT ); Mon, 29 Mar 2004 15:13:49 -0500 Message-ID: <4068836F.2050503@pobox.com> Date: Mon, 29 Mar 2004 15:13:35 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Lang CC: Pavel Machek , linux-ide@vger.kernel.org, Linux Kernel , Andrew Morton Subject: Re: [PATCH] speed up SATA References: <4066021A.20308@pobox.com> <20040329113641.GE1453@openzaurus.ucw.cz> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1016 Lines: 27 David Lang wrote: > Pavel, when you say that 32MB would be 1 second is that due to the limits > of the SATA bus or are you baseing this on a particular drive? > > if you are basing it on a current single SATA drive (7200rpm 8MB cache, > etc) consider that if you are writing to a solid state drive or to an > array that presents itself as a single SATA drive then the transaction can > happen MUCH faster. > > if this is a limit of the SATA interface bitrate, consider that over the > last several years EVERY interface has seen it's bitrate climb > significantly, frequently with little (if any) fundamentalchange to the > drivers nessasary to run things. Sata-1 is 1.5Gbps, and Sata-2 is 3.0Gbps. 6.0Gbps is the next step people seem to be working on... Jeff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/